In pxa3xx_gcu_write, a count parameter of type size_t is passed to words of
type int.  Then, copy_from_user() may cause a heap overflow because it is used
as the third argument of copy_from_user().
Signed-off-by: NHyunwoo Kim <imv4bel@gmail.com>
Signed-off-by: NHelge Deller <deller@gmx.de>